Fat Bitches and Public Transit

I could never stand sitting next to fat people in public transit. They always end up huffing and puffing away like werewolves, sweating, and generally taking up about 2x as much space as a normal person. This usually means that I'm stuck up against the window with my crotch really hurting after about 5mins, and this person being completely oblivious to the fact I have no room whatsoever. Even worse, their weight just throws around like nothing. Any minor bump and the person's whole weight comes crushing against me, bodychecking me into the window. As if there wasn't enough room on the bus already, we have to deal with fat people. I think there's handicapped paratransit for people like them... and if not, there should be.